RU2464491C2 - Large par lamp demonstrating superb light with higher efficiency and extended service life - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: proposed assembly of a ceramic-metal halogen lamp comprises a ceramic-metal halogen source of light, including a discharge chamber, holding the first and second separate electrodes, which are in electric connection with the first and second leads and are placed into a translucent tight capsule and a flat parabolic reflector with a focus point arranged along the axis of reflector rotation and between the end of the reflector base and the open end of the reflector. At the same time the reflector has a reflecting surface arranged as capable of receiving light from a source of light and directing light in a certain manner through an open end of the reflector. The reflector has the second size of depth measured along the axis of rotation, besides, the second size is smaller than the first size of the light source. The light source has an extended first axial size.

EFFECT: development of a PAR lamp with improved light quality and efficiency, and also higher accuracy of light source location in a reflector.

8 cl, 5 dwg

Description

BACKGROUND

The invention relates to large lamps with a parabolic aluminized reflector (PAR) (for example, PAR56 and PAR64, where the number shows the diameter of the widest part of the lamp in eighths of an inch), which are widely used in the specialized market for spot and diffuse lighting in halls, corridors, etc. .d.

Historically, in this market, light sources are used that give light when incandescent, for example a halogen light source, where the filament of the light source is oriented vertically (or parallel) to the central axis of the lamp beam. The indicated orientation simplifies the direction of light by the reflector and improves optical control. The filament of the halogen light source is usually located in the capsule in order to maintain the halogen cycle (evaporation of tungsten from the filament, the interaction of tungsten with halogen (such as iodine, bromine, chlorine or fluorine) and the prevention of the deposition of tungsten on the lamp wall and blackening of the wall surface). Halogen light sources are used due to the excellent color of the light, but at the same time they have a relatively short life and low efficiency.

Although quartz metal halide lamp sources may have increased efficiency and service life, these improvements are offset by a significant reduction in color quality. Ceramic-metal halogen (CMH) light sources are known to provide high efficiency, longer life, and good color. In other words, a ceramic-metal halogen light source combines the advantages of both halogen and quartz light sources, without having any of their significant drawbacks. In fact, for several years, CMH arc tubes have been contained in smaller PAR reflectors (PAR20, PAR30, and PAR38) for general, commercial lighting. CMH lamps work better in a horizontal position (as opposed to quartz lamps that work better in a vertical orientation, as noted above).

Although it has been proposed to replace quartz light sources in large PAIR lamps, there are physical limitations that prevent the simple replacement of one type of light source with another. For example, when installing a 150 watt CMH capsule of an arc tube in a large SAW reflector, there is difficulty associated with the size and location of the arc tube, as well as with the preferred direction of operation of the lamp. In particular, the PAR56 reflector is wide and fairly flat. Thus, an elongated CMH lamp with a power of 150 W cannot be installed in the reflector, that is, one end of the light source will protrude outward from the outer end of the lamp. In addition, the installation of a light source with a CMH arc tube with a power of 150 W along the axis of the lamp is also undesirable for optimal operation of the light source, as noted above. It also becomes important to place the light source at the correct distance from the rear of the reflector in order to eliminate or limit deviation from the ideal beam shape.

In the layout of the even larger PAR64 lamp, to date, the installation of a CMH light source or an arc tube with a power of 150 W has simply not been completed. The PAR64 reflector has a slightly deeper depth and thus allows the installation of an elongated CMW light source capsule with a power of 150 W in the axial direction, that is, along the axis of the lamp. However, most likely, a 150 W light source did not appear on the PAR64 market.

Thus, there is a need for a large specialized PAR lamp (PAR56 and PAR64 values) with features such as excellent color, efficiency, service life, and the exact location of the light source in the reflector.

SUMMARY OF THE INVENTION

A preferred embodiment relates to a 150 watt CMH light source having an elongated first axial dimension. A flat parabolic reflector having a focal point located along the axis of rotation of the reflector, between the end of the base of the reflector and the open end of the reflector has a reflective surface configured to receive light from a light source and direct light in a certain way through the open end of the reflector. The reflector has a second depth dimension, measured along the axis of rotation, the second dimension being smaller than the first size of the light source, and the light source is located almost perpendicular to the axis of the reflector at its focal point.

The light source is located between the first and second parts of the frame.

Each frame part has a first section passing through the reflector surface in the first direction (z direction) as a whole parallel to the axis of rotation.

Each frame member includes a second portion that extends in a second direction (y direction) substantially perpendicular to the first portion.

Each frame member includes a third portion that is located between the first and second portions, the third portion extending in the third direction (x direction), representing a cross section of the light source and the capsule located between the second portions of the first and second chassis members.

Third portions of the first carcass part and the second carcass part can be placed around the capsule between the first end of the capsule and the focal point.

The main advantage is the ability to provide a media light source in a large PAR lamp.

Another advantage is realized by the reliable installation of a media light source across the axis of rotation of the lamp reflector.

Another advantage relates to a reliable method of installing a light source in a lamp assembly.

Additional features and advantages will become apparent after reading and understanding the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a top view of an arc tube equipped with frame components.

Figure 2 is a front view of the right frame holder for a transversely mounted arc tube for the PAR56 lamp.

Figure 3 is a side view of the right frame holder of Figure 2.

Figure 4 is a side view of a PAR56 lamp with an arc tube capsule centered between the components of the frame holder.

5 is a side view of a PAR64 lamp with an arc tube capsule mounted along an axis.

DETAILED DESCRIPTION OF THE INVENTION

Referring to Figures 1-4, which shows the assembly of the lamp 20, including the light source 22, namely a ceramic-metal halogen (CMH) lamp, individual structural details and their operation are known from the prior art, therefore, for a complete understanding of the present invention, a corresponding full description is not required . Briefly, and also in order to coordinate the following description, the CMH 22 light source has a central body 24, which holds the flooded and separate electrodes 26 and 28. The electrodes have eyeliner sections that extend through the legs shown in this embodiment as the first and second legs 30 and 32, which extend in opposite directions along the axis from the central body 24. The legs are soldered into the body in any conventional manner.

The light source 22 is housed in a translucent capsule 34, which encloses the CMH body, legs and electrodes in the capsule, the capsule shown here is an asymmetric structure that protects the inner liner portions 40 and 42, which in turn are electrically and mechanically connected to eyeliners 26 and 28, extending from the first and second legs. The inner liner portions 40 and 42, on the other hand, support the body in the capsule, and are also connected in the sealed region 44 (hermetically pressed or sealed, for example) by flat conductive regions such as thin molybdenum foil (not shown), which is electrically connected to external eyeliners 46 and 48. The inner eyeliner section 42 is much longer than the inner eyeliner 40, since it mechanically connects the leg 32 at the distal end to the sealed area 44. Of course, it should be understood that but LCDs 30 and 32 are shown longitudinally and that other configurations may be used without departing from the scope and purpose of this application.

Basically, the design of the light source described above is common. Due to the shallow depth of the reflector in the PAR56 lamp, the light source capsule 34 is mounted in the transverse direction to the axis of rotation AR of the reflector 60 (i.e., the parabolic reflector in the PAR lamp) of the lamp assembly 20 (Figure 4). This is achieved by a new reliable mounting or holding assembly 62, the individual parts of which are shown in each of Figures 1-4. As noted in the Background Art, a CMH light source often works best in a horizontal plane. The specified transverse installation allows the light source to remain in a horizontal position relative to all possible orientations of the axis of rotation of the reflector intended for installation in the vertical direction.

More specifically, as shown in Figure 4, the clips or the first sections 64 of the frame (the left section is essentially identical to the right section, unless otherwise indicated) extend upward through the base of the reflector and usually parallel to the axis AR. As can be seen from the presented Figure 3, the first sections 64 of the frame include special sections, namely the linear first sections 64a, the angular second sections 64b and the external, linear third sections 64c. The first sections of the frame while bent from one end approximately ninety degrees and combined with the second sections 66 of the frame (Figure 2). These bends of the frame sections provide rigidity and reliability during assembly, so that the capsule is held in position in the recess of the reflector. The second sections 66 usually extend along the main portion of the capsule, as shown in Figures 1 and 2.

At the end 66a of the second sections distant from the junction with the first sections 64c, one of the second sections (shown in Figure 1 as the left section 66a) supports the sealed end 44 of the capsule. In particular, the bracket 70 is associated with the end 66a and is wrapped around the sealed end of the capsule. In addition, an intermediate part of the holder, such as wire 72, moves away from the middle position along the other second portion (shown as the right portion in Figure 1) and preferably wraps the capsule around the perimeter in a position separated from the central body of the CMH light source.

As can be clearly seen from Figure 1, sections of the frame, in addition to the mechanical support described in the previous paragraphs, also provide an electrical connection to the light source. In particular, the connecting wires 76 and 78 are preferably wound and / or spot welded to the outer end wires 46 and 48, respectively. The connecting wires 76 and 78 are small enough and therefore do not increase the reliability of the mechanical holder in the reflector, however, they provide a reliable electrical connection to the light source using eyeliners.

Thus, the light source is effectively supported in the PAR lamp in a transverse manner, so that the resulting passing length of the 150W CMH light source capsule can be completely placed in the PAR56 reflector. Similarly, this arrangement provides a reliable electrical connection, with the body of the light source located exactly at the focal point of the reflector. This provides an additional advantage of providing reliable mechanical support, partly due to the bending of the frame sections, which thereby limit the transmission of forces.

Figure 5 shows the assembly of the lamp PAR64. Although a 150 W CMH light source is still preferred, the length from the base of the reflector to the outer perimeter at the outer end of the reflector is sufficient to mount the capsule of the light source. Thus, the holder can be modified so that the light source can be installed parallel to the axis of rotation of the reflector. For the sake of simplicity and comparison, to designate similar parts, similar item numbers are used, indicated by a dash ('). A substantially similar framework 62 'may be used. It should be noted a similar first section 64 of the frame, which includes three different areas 64a ', 64b' and 64c ', which extend into the vertical, angular and opposite vertical sections from the base of the reflector 60'. Instead of bending ninety degrees, as in the embodiment of Figures 1-4, the carcass 62 'continues in a linear direction on both sides of the arc tube capsule 34'. Again, the bracket 70 'moves away from one of the frames (designated here as 64'), since there is no need to bend the frame ninety degrees. Similarly, the holder wire 72 ', which extends for support from another frame 64' (right-hand frame), is preferably wrapped around the capsule and secured, for example, by spot welding, to the frame 64 '. In addition, a similar electrical connection is reliably provided by wires 76 'and 78' located between the wiring 46 'and 48' and the frames 64 '.

To get a good beam shape from the PAR reflector, the light source must be placed exactly on the axis of the lamp and at the right distance from the back of the reflector. This is easily achieved by means of an arc tube mounted axially, as shown in Figure 5. Although the arc length along the axis of the lamp causes some deviation from the ideal beam shape, this also leads to the fact that the operating characteristics become less sensitive to the location of the central length of the light source relative to the back of the reflector.

As for the transverse installation of the arc tube in Figures 1-4, this installation method ensures that the light source is placed on the axis of the lamp and at the correct distance from the rear of the reflector. The specified new installation method ensures the correct location of the light source through the shape and size of the wire frame. The holding elements are manufactured with excellent accuracy using a welding jig that holds the arc tube and wire frame in the correct position during the welding process. Then the retaining elements are inserted into the steam and soldered into place. The retaining element is reliable against failure, as it is strong and balanced, which minimizes stress, as well as reliable with respect to performance. The light source is centered relative to the vertical part of the frame in the x and y directions, providing a coaxial position of the light source relative to the reflector.

Claims (8)

1. The assembly of a ceramic-metal halogen lamp, containing:
a ceramic-metal halogen light source including a discharge chamber containing first and second separate electrodes, which are in electrical connection with the first and second leads and are housed in a translucent, sealed capsule, the light source having an elongated first axial dimension;
a flat parabolic reflector with a focal point located along the axis of rotation of the reflector and between the end of the base of the reflector and the open end of the reflector, while the reflector has a reflective surface configured to receive light from the light source and direct light in a certain way through the open end of the reflector, while the reflector has a second depth dimension measured along the axis of rotation, the second dimension being smaller than the first size of the light source;
moreover, the specified light source is located essentially perpendicular to the axis of the reflector at its focal point,
the specified light source is located between the first and second parts of the frame,
wherein each frame member has a first portion that passes through the reflector surface in a first direction (z direction), generally parallel to the axis of rotation,
a second portion that extends in a second direction (y direction) substantially perpendicular to the first portion, and
a third section located between the first and second sections, the third section extending in the third direction, which represents the cross-sectional size of the light source and the capsule located between the second sections of the first and second frame parts, the second sections extending along the length of the capsule. 2. The lamp assembly of claim 1, wherein the SMN light source is rated at approximately 150 watts. 3. The lamp assembly according to claim 1 or 2, wherein the reflector is a PAR56 reflector. 4. The lamp assembly according to claim 1, in which the sealed capsule containing the light source is asymmetric. 5. The lamp assembly according to claim 1, in which the first and second electrodes are aligned along the axis and extend from opposite ends of the discharge chamber, each electrode being mechanically and electrically connected to internal solders, which are connected to sections of molybdenum foil, electrically connected to external solders that extend from the first end of the sealed capsule. 6. The lamp assembly according to claim 5, in which the capsule is held between the second section of the first frame part and the second section of the second frame part by the third section of the first frame part and the third section of the second frame part extending from the second section of the first frame part and the second section of the second part frame, respectively, around the circumference of the capsule in separate positions. 7. The lamp assembly according to claim 6, in which the third sections of the first frame part and the second frame part are placed around the capsule between the first end of the capsule and the focal point. 8. The lamp assembly according to claim 1, in which the elongated SMN light source has first and second legs extending from the axial opposite ends of the discharge chamber.

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